47721341731556 has 24 divisors (see below), whose sum is σ = 83771416478904. Its totient is φ = 23786705053440.

The previous prime is 47721341731549. The next prime is 47721341731559. The reversal of 47721341731556 is 65513714312774.

It can be written as a sum of positive squares in 4 ways, for example, as 2963100905956 + 44758240825600 = 1721366^2 + 6690160^2 .

It is a super-2 number, since 2×47721341731556² (a number of 28 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (47721341731559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3164225 + ... + 10269128.

It is an arithmetic number, because the mean of its divisors is an integer number (3490475686621).

Almost surely, 2^{47721341731556} is an apocalyptic number.

It is an amenable number.

47721341731556 is a deficient number, since it is larger than the sum of its proper divisors (36050074747348).

47721341731556 is a wasteful number, since it uses less digits than its factorization.

47721341731556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13436111 (or 13436109 counting only the distinct ones).

The product of its digits is 14817600, while the sum is 56.

The spelling of 47721341731556 in words is "forty-seven trillion, seven hundred twenty-one billion, three hundred forty-one million, seven hundred thirty-one thousand, five hundred fifty-six".